Girlfriend and sister at the same time?

[Dmkdanie]

so i spoke to my friend on the phone. he talked to me and was at a meeting with another friend at the same time (he was not drunk or anything like that). dialogue between him and his friend:
-who are you talking to?
- with my sister [here my name] (he sometimes calls me sister, I call him brother)
- it's more your girlfriend -yes, my girlfriend and sister. he knew I heard it and he laughed right after it. what was his point? that was weird. we flirt with each other sometimes, but he has a girlfriend.

[Anonymous]

maybe he meant girl friend, a friend who is a girl. The English language is confusing with these terms xD

[Dmkdanie]

No, I come from a country where English is not normally spoken

[Opinion Owner]

ah, so he was calling you a word that is specific to a romantic partner? Or can it be ambiguous?

[Dmkdanie]

it was specific in this context. in general, the word" girl"in my language is also ambiguous, but in this sentence it does not fit. or he made a joke, but the word "my" girlfriend was used and in my language the meaning is obvious.

[Kaneki05]

That's called incest.